WILLIAM SHAKESPEARE, Hamlet

Can I see another's woe,

And not be in sorrow too?

Can I see another's grief,

And not seek for kind relief?

The greatest griefs are those we cause ourselves.

SOPHOCLES, Oedipus Rex

Pure and complete sorrow is as impossible as pure and complete joy.

Any mind that is capable of a real sorrow is capable of good.

Sorrow makes for sincerity, I think.

Give sorrow words: the grief that does not speak

Whispers the o'er-fraught heart, and bids it break.

The busy bee has no time for sorrow.

There is no greater sorrow

Than to be mindful of the happy time

In misery.